hdaudio_dma_alloc
err = hdaudio_dma_alloc(st->st_host, &st->st_data,
err = hdaudio_dma_alloc(sc, &dma, BUS_DMA_COHERENT | BUS_DMA_NOCACHE);
if ((err = hdaudio_dma_alloc(sc, &sc->sc_corb, BUS_DMA_WRITE)) != 0)
if ((err = hdaudio_dma_alloc(sc, &sc->sc_rirb, BUS_DMA_READ)) != 0)
int hdaudio_dma_alloc(struct hdaudio_softc *, struct hdaudio_dma *, int);